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	This package defines APIs for using torm. It contains a abstract 
	PersistenceManager and an implemented subclass TormManager.
	The only thing  what the client application want to do is import 
	the class PersistenceManager and invoke its getInstance methed.
	A typical useage:</br>
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	...</br>
	Student stu=new Student();</br>
	pm=PersistenceManager.getInstance();</br>
	pm.insert(stu);</br>
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	This example will insert an instance of class Student into a 
	relational database
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